[19-Mar-2016 10:27:18 Asia/Kolkata] PHP Notice:  Undefined index: fk_i_region_id in /home/public_html/oc-includes/osclass/frm/Item.form.class.php on line 542
[19-Mar-2016 10:27:21 Asia/Kolkata] PHP Notice:  Undefined variable: item_id in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 2
[19-Mar-2016 10:27:21 Asia/Kolkata] PHP Notice:  Undefined index: seo_title in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 29
[19-Mar-2016 10:27:21 Asia/Kolkata] PHP Notice:  Undefined index: seo_desc in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 36
[19-Mar-2016 10:27:21 Asia/Kolkata] PHP Notice:  Undefined index: seo_keywords in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 43
[19-Mar-2016 10:27:29 Asia/Kolkata] PHP Notice:  Undefined index: fk_i_region_id in /home/public_html/oc-includes/osclass/frm/Item.form.class.php on line 542
[19-Mar-2016 10:27:32 Asia/Kolkata] PHP Notice:  Undefined variable: item_id in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 2
[19-Mar-2016 10:27:32 Asia/Kolkata] PHP Notice:  Undefined index: seo_title in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 29
[19-Mar-2016 10:27:32 Asia/Kolkata] PHP Notice:  Undefined index: seo_desc in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 36
[19-Mar-2016 10:27:32 Asia/Kolkata] PHP Notice:  Undefined index: seo_keywords in /home/public_html/oc-content/plugins/all_in_one/item_edit.php on line 43

@Ghany
First one is not related to plugin.
For others, go to file:
oc-content/plugins/all_in_one/item_edit.php

Find line:
<div id="seo_table">
Bellow this line, add following code:
<?php
  $detail['seo_title'] = isset($detail['seo_title']) ? $detail['seo_title'] : '';
  $detail['seo_desc'] = isset($detail['seo_desc']) ? $detail['seo_desc'] : '';
  $detail['seo_keywords'] = isset($detail['seo_keywords']) ? $detail['seo_keywords'] : '';
?>


ok thank u bro...........